[riot-notifications] [RIOT-OS/RIOT] boards/stm32f3discovery: fix openocd config to flash from invalid state (#11550)

Gaëtan Harter notifications at github.com
Wed Sep 11 12:18:32 CEST 2019

> Tested this PR and couldn't find any obvious regression. My main problem with testing is to find a firmware that avoid reflashing the board after. I tried to toggle the CPU to deep sleep, but OpenOCD is still able to reflash.

Somehow I think it would need to be a firmware that does it, or a hardfault as it was for the `stm32l` boards, as first step in main with no init done before.

Because if openocd resets the board, and manages to start writing before it hardfaults or sleep, it would work.

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